โจทย์ เลขยกกำลัง 1

จงหาผลลัพธ์ในรูปเลขยกกำลัง

1.    4 ⁵ × 5 ⁰ × 4⁷  

=  4 ⁵⁺⁷ × 5 ⁰

=  4 ¹² × 1

=   4 ¹²

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2.    2 ³ × 4 ^-1

=  2 ³ × 2 ^2+(-1)

=  2 ³ × 2 ¹

=   2 ³⁺¹

= 2 ⁴

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 3.    3 ^-4 × 3 ^-2 × 81

=  3 ^{-4 + (-2)} × 3 ³

=  3 ^-4-2+3

=  3 ^-3

=  1/3 ³

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4.    (-2) ⁴  × (-2) ^-2 × (-2)^-2

=  (-2) ^{4 + (-2) + (-2)}

=  (-2) ⁰

=  1

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